return osErrToFileErr(err)
	}

	odirectEnabled := globalAPIConfig.odirectEnabled() && s.oDirect && fileSize > 0

	var w *os.File
	if odirectEnabled {
		w, err = OpenFileDirectIO(filePath, flags, 0o666)
	} else {
		w, err = OpenFile(filePath, flags, 0o666)
	}
	if err != nil {
		return osErrToFileErr(err)
	}

	var bufp *[]byte
	switch {